username = "zhangsan"
password = "123456"
time_wrong = 1
while time_wrong <4 :
    name = input("请输入账号:")
    pwd = input("请输入密码")
    if username == name and password == pwd:
        print("登录成功")
        break
    else:
        time_wrong  += 1
        print("账号密码错误")


# 做得不错，不过还有99乘法表怎么没做呢
